电沉积我功能复合材料的研究现状与展望

综述了国内外在复合电沉积制备多元复合材料方面的进展，重点探讨了耐磨复合材料镀层，自润滑复合材料镀层，电接触功能的复合材料镀层，耐蚀复合材料镀层等的研究现状和发展趋势，结果显示，随着现代科学技术的快速发展，单金属复合镀层难于满足某些特殊需求，而多元复合材料镀层由于具有耐磨，耐蚀和耐高温氧化等优点，在今后的发燕尾服中将得到广泛的应用。     

金属基抗震复合材料的研究现状与展望

研制开发具有抗震性能的金属基复合材料具有广阔的发展前景，对近几年来金属基抗震复合材料的最新进展进行了系统论述，提出了金属基抗震复合材料研究中存在的问题，并对金属基抗震复合材料的应用与发展前景进行了展望。     

Al—B—C复合材料废料的再生方法

本专利介绍了Al—B4C复合材料的再生回用的方法，该方法包括：加热铝液池的同时，预热复合材料的废料，然后，将该废料加入铝液中，并将铝液保持一定的温度，直到废料全部熔于铝液中而形成复合材料，同时对该复合材料进行搅拌，以保证其成分的均匀性。另外，本专利还介绍了含B4C的铝合金复合材料的制备方法。     

Mo-Cu复合材料研究进展

Mo-Cu复合材料具有可调控的热膨胀系数、良好的导电导热性能、优异的耐高温性，广泛应用于电触头、电子封装、热沉材料等领域。目前国内外Mo-Cu复合材料制备方法主要有熔渗法、粉末冶金法、液相烧结法等。近年来相关研究学者基于复合粉末原料设计、制备工艺调控及后处理工艺进行Mo-Cu复合材料制备技术的探究，采用激光烧结成型技术、热轧复合技术等方法制备了高致密度、性能优异的Mo-Cu复合材料，为Mo-Cu复合材料制备提供了新思路、新方法，但相关研究技术不够成熟，限制了Mo-Cu复合材料规模化制备与应用，Mo-Cu复合材料未来的研究方向主要是工业化制备性能优异的Mo-Cu复合材料。     

冷热循环对粉末冶金SiCp/Al复合材料力学性能的影响

采用粉末冶金制备了15％（体积分数）SiCp/Al复合材料，研究了不同冷热循环工艺对复合材料力学性能的影响。结果表明，上限温度在175℃以下的冷热循环对复合材料的屈服强度和抗拉强度影响不大，当上限温度达到200℃后复合材料的屈服强度提高了80MPa，抗拉强度则基本不变。复合材料的屈服强度的提高主要是由于材料在冷热循环的高温过程中基体中的G．P区转变成了过渡相口”。断口观察表明，经过不同冷热循环工艺处理后，复合材料的断裂形式大致相同，即除了基体断裂外，还存在SiC颗粒开裂的情况。冷热循环对复合材料的延伸率影响不明显。     

难熔金属复合材料的开发与应用

介绍了难熔金属在现代复合材料中的应用现状、复合材料的制造方法．包括以难熔金属为基和以化合物为基的复合材料、层状复合材料、用难熔金属纤维增强的复合材料、梯度功能材料。超导复台材料等，展望了难熔金属复合材料的发展前景。     

ARZ陶瓷颗粒增强316L不锈钢复合材料的制备及性能

采用粉末冶金工艺制备了Al₂O₃增强ZrO₂(alumina reinforced zirconia,ARZ)陶瓷颗粒增强316L不锈钢(316L不锈钢/ARZ)复合材料，研究了ARZ陶瓷颗粒体积分数对316L不锈钢/ARZ复合材料的微观组织、相对密度、硬度、耐磨性的影响。结果表明：当ARZ陶瓷颗粒体积分数为20%时，复合材料的相对密度达到97.53%，与不锈钢基体相当；继续加入ARZ陶瓷，陶瓷颗粒发生团聚降低了复合材料相对密度。316L不锈钢/ARZ复合材料的硬度随着ARZ陶瓷颗粒体积分数的增高而增大，当ARZ陶瓷颗粒的体积分数为60%时，复合材料的硬度达到最大值HRB 96.8。复合材料耐磨性优于不锈钢基体，其中含有体积分数为60%ARZ陶瓷颗粒的复合材料体积磨损率较基体减少了4.2倍；随着ARZ陶瓷颗粒含量的增加，复合材料的耐磨性提高，复合材料的磨损机理主要为316L不锈钢的剥落。     

纳米高强度复合材料的发展现状

介绍了纳米高强度复合材料制备方法。工艺和强度改善方面的进展。目前陶瓷纳米复合材料、碳纳米管复合材料是人们开发的热点，最后介绍了高强度纳米复合材料的应用前景。     

Ti-Ni-C形状记忆复合材料制备研究

采用几种不同工艺方法制备了Ti-Ni-C形状记忆复合材料，用扫描电镜和光学显微镜，对复合材料的微观组织进行了分析，并考察了材料的力学性能。结果表明，SHS合成与真空熔炼相结合能制备出TiC均匀分布．致密的Ti-Ni-C复合材料，TiC强化效果显著；然而，熔炼时间过长,TiC会聚集长大。组织粗化。复合材料的硬度下降。     

颗粒增强低成本钛基复合材料

采用TiC颗粒和熔铸法制备TiCp／TIMETAL62S复合材料，研究了钛基复合材料的显微组织和室温力学性能。结果表明：TiCp／TIMETAL62S复合材料的组织由针状αa相、少量β相和TiC颗粒组成；TiC颗粒改变了基体合金原有组织，促进了复合材料组织的细化；钛基复合材料具有良好的室温强度和塑性，复合效果良好。     

Directionally Constrained Viscoplasticity for Metal Matrix Composites

A theoretical framework along with an experimental comparison and numerical simulation is presented, for the modeling of the viscoplastic behavior of metal matrix composites (MMCs). MMCs are finding increasing applications in aerospace structures. MMCs have strong directional properties that directly influence the evolution of the internal variables, namely, the backstress and viscoplastic strain. The model is developed within a micromechanical framework for MMCs using the equilibrium surface approach. The directional properties of MMCs are incorporated by proposing a constrained equilibrium surface, which is based on the constrained stress terms proposed. The micromechanical framework combines the viscoplastic properties of the matrix with the elastic properties of the fiber. Model-generated experimental comparisons and simulations are also presented.     

Damping behavior of discontinuously reinforced ai alloy metal-matrix composites

High damping materials allow undesirable mechanical vibration and wave propagation to be passively suppressed. This proves valuable in the control of noise and the enhancement of vehicle and instrument stability. Accordingly, the scientific community is continually working toward the development of high damping metals (hidamets) and high damping metal-matrix composites (MMCs). The MMCs are particularly attractive in weight-critical applications when the matrix and reinforcement phases are combined to provide desirable property combinations, such as high damping and low density. Inspection of the available scientific literature, however, reveals that an understanding of the precise correlation between the presence of secondary phases (either reinforcements or precipitates) and material damping has eluded investigators, partly as a result of the superposition of multiple mechanisms. As a step toward the clarification of damping phenomena in discontinuously reinforced MMCs, this article describes the damping behavior and mechanisms that are present in discontinuously reinforced MMCs, with particular emphasis on particulate-reinforced Al alloy MMCs processed using spray atomization and deposition. The operative damping mechanisms in the particulate-rein-forced MMCs are discussed in light of the data obtained from microstructural studies and damping capacity measurements. This article is based on a presentation given in the Mechanics and Mechanisms of Material Damping Symposium, October 1993, in Pittsburgh, Pennsylvania, under the auspices of the SMD Physical Metallurgy Committee.     

热压技术在新型P/M金属基复合材料中的应用

反应烧结是合成颗粒增强金属基复合材料 (MMCs)的新工艺。与传统P M工艺相比 ,通过化学反应在金属基体中产生增强颗粒有诸多优势。由Al TiO2 B经反应烧结制备的Al (Al2 O3+TiB2 )MMCs便是这样一个例子。本文用热压技术将多孔Al (Al2 O3+TiB2 )MMCs致密化并得到了很好的力学性能。Al ( 10 2 %Al2 O3+9 2 %TiB2 ) (体积分数 )的弹性模量、抗弯强度和弯曲最大应变分别为 10 5GPa、50 9MPa和 5 0 %。如果复合材料的成分改变成Al ( 5 4 %Al2 O3+4 9%TiB2 ) (体积分数 ) ,其性能则分别为 89GPa ,311MPa和 8 2 %。文中亦将热压Al (Al2 O3+TiB2 )MMCs的结果与用其他致密化技术处理此材料的结果 ,以及热压其他类似材料的结果进行了比较。     

金属基复合材料的发展及其应用

金属基复合材料是近几年来复合材料研究中的热点.文章综述了金属基复合材料的分类、性能特点、制备方法,总结了其主要进展及应用.     

Damping behavior of 6061Al/Gr metal matrix composites

The damping behavior of graphite particulate-reinforced 6061A1 alloy metal matrix composites (MMCs) processed by spray atomization and codeposition is studied. Four spray deposition experiments are made, yielding materials with graphite volume fractions of 0, 0.05, 0.07, and 0.10. A dynamic mechanical thermal analyzer is used to measure the damping capacity and elastic modulus at 0.1, 1, and 10 Hz over the temperature range of 30 °C to 250 °C. The damping capacity of the materials is shown to increase with increasing volume fraction of graphite. Hot extrusion of the spray-deposited MMCs is shown to further increase the damping capacity. The elastic moduli of the spray-deposited MMCs are reduced with the addition of graphite but are improved by hot extrusion. At low temperatures (below 150 °C), the high damping capacity of the MMCs is attributed primarily to thermal expansion mismatch-induced dislocations and the high intrinsic damping of graphite. At high temperatures (above approximately 200 °C), the damping capacity is attributed to Al/graphite interface viscosity, preferred orientation of the graphite, and the presence of dislocations.     

The Influence of Ni-Coated TiC on Laser-Deposited IN625 Metal Matrix Composites

IN625 Ni-based metal matrix composites (MMCs) components were deposited using Laser Engineered Net-Shaping (LENS) with Ni-coated and uncoated TiC reinforcement particles to provide insight into the influence of interfaces on MMCs. The microstructures and spatial distribution of TiC particles in the deposited MMCs were characterized, and the mechanical responses were investigated. The results demonstrate that the flowability of the mixed powders, the integrity of the interface between the matrix and the TiC particles, the interaction between the laser beam and the TiC ceramic particles, and the mechanical properties of the LENS-deposited MMCs were all effectively improved by using Ni-coated TiC particles.     

陶瓷增强金属基复合材料的研究进展

介绍了陶瓷增强金属基复合材料研究的最新进展。研究了陶瓷增强剂的性能、复合材料的先进制备技术、各种金属基复合材料的性能和应用，以及复合材料研究中存在的问题和今后的发展趋势。     

Homogenization of metal matrix composites by high-pressure torsion

This article deals with the homogenization of metal matrix composites (MMCs) with inhomogeneous particle distribution by severe plastic deformation. In this study, Al6061-10 pct SiC and Al6061-20 pct Al₂O₃ powder metallurgy (PM) MMCs with clustered particle distribution in the as-fabricated condition are subjected to high-pressure torsion (HPT) at room temperature. The evolution of the microstructure during HPT is investigated. It is shown that, in the two materials, two different types of particle clusters appear that behave differently during deformation. In MMCs with dense particle clusters, the process of declustering during HPT occurs through a mechanism of particle debonding from the surface of the clusters. On the contrary, in MMCs with diffuse particle clusters, the deformation of the clusters is mainly responsible for the homogenization; therefore, the strain necessary to obtain a homogeneous particle distribution can be predicted by the Tan and Zhang model (M.J. Tan and X. Zhang: Mater. Sci. Eng. A, 1998, vol. 244, pp. 80–85).     

A Phenomenological Model for Tool Wear in Friction Stir Welding of Metal Matrix Composites

Friction stir welding (FSW) of metal matrix composites (MMCs) is advantageous because the solid-state nature of the process precludes formation of deleterious intermetallic phases which accompany melting. FSW of MMCs is complicated by rapid and severe wear of the welding tool, a consequence of contact between the tool and the much harder abrasive reinforcement which gives the workpiece material its enhanced strength. The current article demonstrates that Nunes’s rotating plug model of material flow in FSW, which has been successfully applied in many other contexts, can also help us understand wear in FSW of MMCs. An equation for predicting the amount of wear in this application is developed and compared with experimental data. This phenomenological model explains the relationship between wear and FSW process parameters documented in previous studies.